Feels Like Fuel

I have a 2005 Dodge 5.9 3500 that feels like its not getting enough fuel out the hole, I thought it was the pickup pump in the tank and installed a FlowDog 150 and by passed the fuel filter canister and it still needs fuel. I do not have a problem at high speed on the highway. truck has a BullyDog PMT and Im not getting any codes...

I do not have a fuel pressure gauge on the truck at this time but I have one on order from alligator Diesel. It feels like fuel because its doing the same thing that it did when my pick up pump in the tank went out a few years ago. Thats why I desided to just stop dropping the tank and installed the flowdog.. Ive been down this road B-4. What do you think???